Hyonatal Tablet

Uses

This product contains several medications: belladonna alkaloids (made up of the drugs hyoscyamine, atropine, and scopolamine) and phenobarbital. Belladonna alkaloids help to reduce the symptoms of stomach and intestinal cramping. They work by slowing the natural movements of the gut and by relaxing the muscles in the stomach and intestines. Belladonna alkaloids belong to a class of drugs known as anticholinergics/antispasmodics. Phenobarbital helps to reduce anxiety. It acts on the brain to produce a calming effect. Phenobarbital belongs to a class of drugs known as barbiturate sedatives.

How to use Hyonatal Tablet

Take this medication by mouth as directed by your doctor. If you are taking the immediate-release tablets or liquid form of this medication, take it usually 3 to 4 times a day or as directed by your doctor.

If you are using the liquid, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

If you are taking the extended-release tablets, take them usually every 12 hours or as directed by your doctor. Do not crush or chew extended-release tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split the tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing.

Antacids lower the absorption of this medication. If you are taking an antacid, take it at least 2 hours apart from this medication.

The dosage is based on your medical condition and response to treatment. In children, the dosage is also based on weight.

Do not increase your dose or take this drug more often without your doctor's approval. Your condition will not improve any faster and the risk of serious side effects may increase.

If you suddenly stop using this medication, you may have withdrawal symptoms (such as anxiety, muscle twitching, shakiness, dizziness, worsening weakness, nausea, vomiting). Withdrawal from the phenobarbital can be severe and include seizures and (rarely) death. To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used this medication for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.

When this medication is used for a long time, it may not work as well. Your doctor may need to increase your dose or change your medication. Talk with your doctor if this medication stops working well.

Though it helps many people, this medication may sometimes cause addiction. This risk may be higher if you have a substance use disorder (such as overuse of or addiction to drugs/alcohol). Take this medication exactly as prescribed to lower the risk of addiction. Ask your doctor or pharmacist for more details.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

This drug may make you dizzy or drowsy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

The liquid form of this product may contain alcohol or sugar. Caution is advised if you have diabetes, alcohol dependence, liver disease, or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.

This medication may make you sweat less, making you more likely to get heat stroke. Avoid doing things that may cause you to overheat, such as hard work or exercise in hot weather, or using hot tubs. When the weather is hot, drink a lot of fluids and dress lightly. If you overheat, quickly look for a place to cool down and rest. Get medical help right away if you have a fever that does not go away, mental/mood changes, headache, or dizziness.

Older adults may be more sensitive to the side effects of this drug, especially drowsiness, confusion, unusual excitement, constipation, and urination problems. Drowsiness and confusion can increase the risk of falling.

Children may be more sensitive to the side effects of this drug. This drug can often cause excitement instead of drowsiness in young children.

This medication is not recommended for use during pregnancy. It may harm an unborn baby. Consult your doctor for details. Hormonal birth control products (such as pills, patch, ring) may not be effective if taken with this medication (see also Drug Interactions section). Discuss reliable forms of birth control with your doctor.

This medication passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

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Interactions

See also the How to Use section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Other medications can affect the removal of phenobarbital from your body, which may affect how this product works. Examples include St. John's wort, among others.

Phenobarbital can speed up the removal of other medications from your body, which may affect how they work. Examples of affected drugs include artemether/lumefantrine, asunaprevir, atazanavir, boceprevir, cobicistat, lurasidone, ranolazine, sofosbuvir, sorafenib, voriconazole, certain calcium channel blockers such as felodipine/nimodipine, among others.

This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use reliable backup birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.

Check the labels on all your medicines (such as allergy or cough-and-cold products, diet aids) because they may contain ingredients that cause drowsiness or a fast heartbeat. Ask your pharmacist about using those products safely.

This medication may interfere with certain laboratory tests (including gastric secretion tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.

Phenobarbital is very similar to primidone. Do not use medications containing primidone while using phenobarbital.

Notes

Management of digestive disorders may include lifestyle changes such as stress reduction programs, exercise, stopping smoking, and dietary changes, in addition to medication. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.

If this medication is used for an extended period of time, laboratory and/or medical tests (such as blood counts, liver function tests) may be performed periodically to check for side effects. Consult your doctor for more details.

Missed Dose

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

Storage

Store at room temperature away from light and moisture. Avoid freezing the liquid. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.Information last revised August 2019. Copyright(c) 2019 First Databank, Inc.

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.